I also started at level 3, via the diploma route not NVQ. My tutor advised me to start at Unit 5 -FRA and then work from there. I am doing my exam next week, so not sure what I am going to do after yet!

In terms of the exams, just take them when you are ready. You also have the option to take CBA (Computer Based Assessment) which you can take any time of the year and you find out your results straight away.

By the way I started my course before it changed over, so this information might not make any sense or be relevant.